nvmet: reorder fields in 'struct nvmet_sq'

Group some variables based on their sizes to reduce holes.
On x86_64, this shrinks the size of 'struct nvmet_sq' from 472 to 464
bytes when CONFIG_NVME_TARGET_AUTH is defined.

This structure is embedded into some other structures, so it helps reducing
their sizes as well.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>

diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
index dc60a22..6cf723b 100644 (file)
--- a/drivers/nvme/target/nvmet.h
+++ b/drivers/nvme/target/nvmet.h
@@ -109,8 +109,8 @@ struct nvmet_sq {
        u32                     sqhd;
        bool                    sqhd_disabled;
 #ifdef CONFIG_NVME_TARGET_AUTH
-       struct delayed_work     auth_expired_work;
        bool                    authenticated;
+       struct delayed_work     auth_expired_work;
        u16                     dhchap_tid;
        u16                     dhchap_status;
        int                     dhchap_step;